Window scaffold



G. w. RICHARDSON WI NDOW S CAFFOLD Filed March 26 1924 2 Sheets-Sheet 1 r a! i5 Km gwwmtov jl G wilifwhards w 3% WWW mm mm;

Dec. 2, 1924.

G. W. RICHARDSON WINDOW S CAFFOLD 1924 2 Sheets-Shem 2 Filed March 26 .5

Patented Tree. 2, 1924s WINDOW SCAFFOLD.

Application filed March 26, 1924, Serial No. 702,121.

To all whom it may concern:

Be it known that I, GEORGE W. RICHARD- SON, a citizen of the United States, residing at Bad Axe, in the county of Huron and State of Michigan, have invented certain new and useful Improvements in Window Scaffolds, of which the following is a speciiication:

My invention relates to window scaffolds.

An important object of the invention is to provide a device of the above mentioned character, which may be readily installed upon or within a window, and adjusted to have clamping engagement with parts thereof, quickly and conveniently.

A. further object of the invention is to provide a device of the above-mentioned character, which is simple in construction, strong and durable.

Other objects and advantages of the invention will be apparent during the course of the following description.

Tn the accompanying drawings, forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same.

Figure 1 is a perspective view of a window scaffold embodying my invention.

Figure 2 is a. plan view of the same.

Figure 3 is a longitudinal section taken on line 3-3 of Figure 2.

Figure 4 is an inner end elevation of the same, and

Figure 5 is a detailed section through the ends of a clamping socket.

in the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral designates a platform, as a whole, embodying longitudinal beams 11, upon the upper side of which are secured planks 12, constituting a floor. The numeral 13 designates a rail, attached to standards 14-, which are attached to the floor 12. The standards 1% are connected by diagonal rails 15 to beams 11, as shown.

Arranged beneath the beams 11 are blocks or stops 16, rigidly attached thereto, which are adapted to work in opposition to an adjustable bar or clamp member 17, slidable longitudinally of the beams 11. The adjustable bar 17 preferably terminates the outer edges of the beams 11, and is provided with extensions 18, secured thereto by hinges 19, arranged upon the top of the bar 17 and these extensions. The adjustable bar 17 is rigidly mounted upon adjustable clamping socket rnen'ibers 20, shown more clearly in Figure 4:. These clamping sockets are split and are provided with apertured ears 21 and 22. The numeral 23 designates a crank, secured to a shaft, 241, rotatably mounted within an opening 25 in the adjustable bar 17. This shaft is provided at its lower end with a reduced screw threaded portion 26, forming a shoulder 27. The upper ear 21 has its opening slightly larger than the redu ed screw threaded portion, and has no screw threaded engagement therewith, while the aperture of the ear 22 is screw threaded for engagement with such screw threaded portion 26. It is thus seen that by rotating the crank 23, the corresponding clamping guide 20 may be opened or contracted.

Means are provided to move the adjusting bar 17 longitudinally of the beams 11, comprising loops or straps 28, mounted upon the bar 17. These loops or straps carry depending arms 29, having horizontal extensions or hooks 30, adapted to engage beneath the inner edge of the window sill 31. The arms 29 have openings formed therein for receiving rotatable shafts 32, provided with. cranks 33, to turn them. These shafts carry stop collars 34, rigidly attached thereto, and engaging rcarwardly of the arms 29. The forward ends of the shafts 32 are screw threaded for engagement within screw threaded openings formed in brackets 35, attached to the floor 12.

The numeral 36 designates a hail, the free ends of which are pivotally connected with the beams 11, as shown at 37. This bail has a. hooked transverse portion 38, to engage over the rung 39 of a ladder 10.

In the use of the device, the extensions 18 are swung to a position above the bar 17, so that the beams 11 may be passed into the window, subsequent to which the extensions are swung outwardly to assume the horizontal position. The cranks are turned to expand the clamping guides 20, and the bar 17 may now be sl'iifted toward the stops 16, by turning the cranks The stops 16 engage the outer side of the window frame, while the extensions 18 engage the inner side thereof. The hooked ends of the arms engage beneath the window sill, for affording increased safety. The bar 17 is clamped to the beams 11 against longitudinal movement thereon by turning the cranks 23.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred embodiment of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to, Without departing from the spirit of my invention, or the scope of the subjoined claim.

Having thus described my invention, what I claim is:

A Window scaliold comprising a platform including a pair of longitudinal GEORGE V. RICHARDSON. 

